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Photocatalytic degradation of Rhodamine B dye with TiO₂ immobilized on SiC foam using full factorial design.

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Allé, Paul Henri; Fanou, Guy Didier; Robert, Didier; Adouby, Kopoin; Drogui, Patrick (2020). Photocatalytic degradation of Rhodamine B dye with TiO₂ immobilized on SiC foam using full factorial design. Applied Water Science , vol. 10 , nº 9. p. 207. DOI: 10.1007/s13201-020-01282-4.

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Résumé

Textile effluents treatment is one of the important environmental challenges nowadays. Photocatalysis has proven its effectiveness for the removal of recalcitrant compounds, and it is considered as a green technology for the treatment of effluents. However, good photocatalytic yield is strongly related to the operating parameters. In this study, a supported TiO₂ on a β-SiC foam was tested for the removal of Rhodamine B (RhB). The photocatalytic discoloration of RhB synthetic solution in our condition was about 90%. The effects of each parameter were assessed through a full factorial design. Sixteen tests were carried out and the response was RhB removal. The most influent parameters were TiO₂/β-SiC foam quantity, the concentration of RhB, the volume of H₂O₂ and pH. Their contributions on RhB removal were, respectively, 53.01, 30.49, 2.7, and 2.48% according to Pareto diagram. Analysis of the coefficients shows that initial concentration of RhB and volume of H₂O₂ had a negative effect on the response. However, the quantity of TiO₂/β-SiC foam and pH had a positive effect on the response. The influence of the flow rate on the process was assessed. The results showed a slight increase in RhB removal. Furthermore, the aging test of TiO₂/β-SiC foam on the photocatalytic efficiency was carried out after ten successive photocatalysis tests. Only 6.7% loss of yield was observed. These results are very encouraging for an application at the industrial scale.

Type de document: Article
Mots-clés libres: photocatalysis; TiO₂/β-SiC foam; Rhodamine B; factorial design
Centre: Centre Eau Terre Environnement
Date de dépôt: 16 sept. 2020 14:58
Dernière modification: 16 sept. 2020 14:58
URI: http://espace.inrs.ca/id/eprint/10390

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